A rifle is aimed horizontally toward the center of a target 0.10 km away, but the bullet strikes 10 cm below the center. Calculate the velocity of the bullet just as it emerges from the rifle
700 m/s
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A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:
a. 10 m/s; 9.8 m/s2. b. 9.0 m/s; 9.8 m/s2. c. 9.0 m/s; 9.0 m/s2. d. 1.0 m/s; 9.0 m/s2. e. 1.0 m/s; 9.8 m/s2.
A supermassive, rapidly rotating star may generate a gamma-ray burst in a(n) _______________ eruption
Fill in the blank(s) with correct word
A conclusion that follows from E=mc2 is that, at the microscopic level,
A) matter is made of force fields. B) tiny indestructible pieces of matter move through empty space. C) there is only matter and antimatter. D) all matter must vibrate at the speed of light. E) matter is made of radiation.
A photon of blue light and a photon of red light are traveling in vacuum. The photon of blue light
A) has a smaller wavelength than a photon of red light and travels with the same speed. B) has a smaller wavelength than a photon of red light and travels with a greater speed. C) has a longer wavelength than a photon of red light and travels with the same speed. D) has a longer wavelength than a photon of red light and travels with a greater speed.